2Cr13钢是汽轮机叶片常用材料,研究其晶粒度的显示方法有其重要的意义。我厂采用精锻工艺,加工2Cr13钢制汽轮机叶片,在生产中一直未能清晰显示叶片晶粒度。以往仅凭马氏体位向来估计其晶粒度大小。众所周知,在奥氏体同一晶粒内往往会有几个不同位向分布的马氏体群。所以,单凭马氏体位向来评定晶粒大小,其数据往往偏低(晶粒度细)。因此,以马氏体位向估计晶粒大小是欠妥的。采用美国“西屋”公司及西德“西门 2Cr13 steel is a commonly used material for turbine blades and it is of great significance to study the display method of its grain size. I plant forging process, processing 2Cr13 steel turbine blades, the production has been unable to clearly show the leaf grain size. In the past, the size of the grain size has always been estimated by the martensite alone. It is well known that there are often several different groups of martensite distributed in the same grain of austenite. Therefore, the grain size has always been determined by the martensite, the data are often low (fine grain size). Therefore, estimating the grain size in terms of martensite is not proper. Using the United States “Westinghouse” company and West Germany "Simon